Roving stop-motion for spinning-frames.



"No. 643,971. Pateli'ted Feb. 20,1900.

a, H. uomunov.

BUVING S TOPTIUTION FOB SPINNING FRAMES.

(n M d m (Application filed Sept. 16, 1899.

NITED STATES PATENT OFFICE.

JAMES H. NORTHROP, OF TUSTIN, CALIFORNIA, ASSIGNOR TO THF. DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS.

ROVING STOP-MOTION FOR SPINNING-FRAMES.

SPECIFICATION forming part of Letters Patent No. 643,971, dated February 20, 1900.

Application filed September 16, 1899. Serial No. 730,671. (No model.)

To all whom it may concern.-

Be it known that I, JAMES H. NORTHROP, a citizen of the United States, residing at Tustin, in the county of Orange and State of California, have invented an Improvementin Roving Stop-Motions for Spinning-Frames, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the production of means for stopping the delivery of roving in a spinning-frame when the thread breaks or becomes unduly slack, manual release of the clamping member by a touch of the operators hand liberating the roving and permitting the guide therefor to move into position to insure delivery of the roving before piecing up, leaving both hands of the operative free to perform the latter operation. After piecing up the open thread eye or hook is brought over the thread and the parts are automatically reset in operative position.

Figure 1 is a partial sectional view from front to back of a sufficient portion of a spinning-frame to be understood with one embodiment of my invention applied thereto, the parts being in operative position. Fig. 2 is a top or plan view of the apparatus shown in Fig. 1. Fig. 3 is a side elevation of the roving stop-motion and the back rolls, showing the roving clamped and its delivery stopped. Fig. 4 is a similar View, but showing the roving liberated and the guide forward close to the back rolls to insure the delivery of the roving to the rolls. Fig. 5 is a perspective view of the throw-off cam, to be described; and Fig. 6 is a sectional detail on the line m m, Fig. 2, looking toward the left.

The front beam a, finger-board a, having the pig-tails (1 the drawing-roll stand D, the drawing-rolls d d, the top rolls d, the back roll (1 and the traverse-rod d maybe and are all of usual or Well-known construction, and instead of the usual trumpets mounted on the traverse-rod to guide the roving to the rolls I have herein made the roving-guides as parts of the roving stop-motion.

A series of open frames b, having each a notched foot I), are herein shown as rigidly secured in an upright position on the traverse-rod by suitable set-screws b the frames being shown in Figs. 2 and 3 with the nearest side omitted. Each frame has pivotally mounted therein at b one member of the stop-motion, shown as a bent arm 9 g, the part g being weighted, while the upturned portion 9 is notched at its upper end at to expose the roving t, which passes through a passage 9 in the enlarged end of the arm, which forms the roving-guide, the nose 9 directing the roving t0 the rolls. A cross-bar b of the frame serves as a stop to limit the forward movement of the guide member, as shown in Fig. 4, said member having attached thereto a stout wire branch g ,'having an open thread eye or hook g to hook over the thread t, Fig. 1. Above the guide member a 00- operating clamp is independently pivoted on the frame I) at 79 said clamp comprising a fingerf and a heavy handpiece or lug f not quite at right angles thereto, the distance between the fulcra b 5 being such that when the finger is in the notch g the guide g and the finger cannot pass between the fulcra.

The parts are shown in normal position in Fig. 1, the machine running properly; but if the thread i breaks or becomes unduly slack the branch 9 is released, and its Weight swings the guide member 9 forward, so that the finger f, which was resting on the top of the nose 9 drops down as the guide moves forward into the notch g 'upon the roving t, clamping it and stopping its delivery, as in Fig. 3.

When the operative comes to repair the damage, he lifts the lug f, withdrawing the finger f from engagement with the roving, liberating the latter and permitting the guide g to move still farther forward, Fig. 4, with its nose g close to the rolls, thereby insuring the delivery of the roving to the rolls without further care on the part of the operative, who has both hands free to piece up in usual manner, after which he lifts the branch g and brings the eye or hook 9 over the thread. This operates to reset the parts of the stopmotion, the rearward movement of the nose 9 lifting the finger f into the position shown in Fig. 1, ready to again act to clamp the roving at the next break or slackness of the thread. The stop-motion being mounted on the traverse-rod, as described, moves bodily therewith and is always ready to operate instantly when occasion requires.

, It is sometimes necessary to throw off all of the stop-motion devices on one side of the frame when starting up, as the ends yet slack, and the stop-motion devices must then be controlled independently of the threads and held inoperative until the slack is taken up. To this end I have secured a bracket 0% to the traverse-rod by a set-screw m Fig. 6, said bracket having a guide-bar m attached thereto, which enters a suitable recess in the frame, an arm m of the bracket forming a bearing for a slide-rod m parallel to and behind the traverse-rod. To this rod I secure castings o (see Figs. 1, 2, and 5,) one near each stop-motion, each casting being notched at c to embrace the rod m and held rigidly thereon by a set-screw 0 while a cam-like toe c is extended from the casting substantially parallel to the rod m the casting being shaped to extend over the traverse-rod, as shown clearly in Fig. 1.

Each of the guide members 9 has a downwardly-extended lug 9 which is engaged by the adjacent cam 0 when the rod m is drawn to the left, Fig. 2, by means of a suitable handle M, the cam passing back of the under side of the lug g and slightly tilting the guide rearwardly and holding it from moving into stopping position should the thread be slack when the frame is started up.

The rod m is moved to the left, viewing Fig. 2, just before starting up, and when the slack has been taken up it is moved back into normal position, releasing the stop-motion devices.

My invention is not restricted to the construction and arrangement herein shown, as I have shown but one practical embodiment of my invention, without attempting to illustrate the various modifications which might be made without departing from the spirit and scope of my invention.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a spinning-frame,a roving-guide maintained in operative position by a normal thread, and a cooperating, manually-released member to clamp and stop delivery of the roving upon breakage of the thread, and also to serve as a detent for the guide, release of said member liberating the roving and permitting the guide to move forward to insure delivery of the roving.

2. In aspinning-frame, means controlled by breakage of the thread to stop delivery of the roving, said means comprising two pivoted, independently mounted members, one of which serves as a roving-guide and the other as a roving-clamp when cooperating with the guide member, manual movement of the clamp member into inoperative position liberating the roving and permitting the guide member to move into position to insure delivery of the roving.

3. In a spinning-frame, a rocking guide for the roving, notched at its upper end, an independently-mounted finger adapted to enter automatically said notch, to clamp and stop delivery of the roving when the thread breaks, said finger also holding the guide from forward movement, and an arm connected with the guide and having an open threadeye, manual release of the finger liberating the roving and permitting the guide to move forward to insure delivery of the roving, engagement of the thread-eye thereafter with the pieced-u p thread resetting the guide and finger in normal position.

4. In a spinning-frame, the drawing-rolls, a pivotally-mounted guide to deliver the roving thereto, a cooperating, independentlymounted finger to clamp the roving when the thread breaks or slackens, and to hold said guide from moving toward the rolls, and means controlled by the thread to retain the guide in operative position, with the clamping-finger inoperative, manual release of the finger after delivery of the roving has been stopped liberating the roving and permitting the guide to move forward to insure delivery of the roving to the rolls.

5. In a spinning-frame, the drawing-rolls, a pivotally-mounted guide behind the back roll and through which the roving passes to the back roll, means controlled by the thread to maintain the guide in operative position, and a clamping device mounted independently of the guide and adapted to cooperate therewith and clamp the roving when the thread breaks or slackens, manual release of said device liberating the roving and permitting the guide to move into position to insure delivery of the roving.

6. In a spinning-frame, drawing-rolls, a traverse-rod, a yarn-guide pivotally mounted thereon, an independently-mounted finger movable with said rod and adapted to clamp and stop delivery of the roving upon breakage or slackness of the thread, means controlled by the thread to maintain the guide in operative position, manual release of said finger liberating the roving and permitting the guide to move toward the rolls, to insure delivery of the roving, and a stop for said guide, to limit its forward movement.

7. In a spinning-frame, drawing-rolls, a traverse-rod, a yarn-guide pivotally mounted thereon, an independently mounted finger movable with said rod and adapted to clamp and stop delivery of the roving upon breakage or slackness of the thread, means controlled by the thread to maintain the guide in operative position, manual release of said finger liberating the roving andpermitting the guide to move toward the rolls, to insure delivery of the roving, a stop to limit the forward movement of the guide, and means to temporarily move the guide out of operative posi- I 5 tion when startiligqip to, permit the slack to Witnesses:

be taken up.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES H. NORTI-IROP.

GEO. HUNTINGTON,

J. G. QUICK. 

